I kinda like the idea of justHence the use of <sarcasm> </sarcasm> tags.
Or, as I like to steal from Jeff Dunham's "Peanut" puppet, <NYEWM> </NYEWM>
Only problem is getting people used to the idea of using ?emoji? to get across concepts that wold normally totally ruin the statement if they had to be typed out, and would often take longer to type out then the actual statement they are appended to.